import { Dayjs } from 'dayjs';
/**
 * Sort array if needed, order matters
 */
export declare function isDeepEql(a: any, b: any): boolean;
export declare const isBoolean: (value: any) => value is boolean;
export declare const isBetween: (toCheck: Dayjs, start: Dayjs | null, end: Dayjs | null) => boolean;